124 SILVA OF NORTH AMERICA. ROSACES. 
increased by the contrasting color of the ample lustrous dark green foliage, the Tollon' is more beauti- 
ful perhaps than any other North American tree. It is still too seldom seen in the gardens of Cali- 
fornia and is rare in those of other parts of the world, although in southern Europe it is perfectly at 
home and flowers and fruits abundantly. 
1 Heteromeles arbutifolia is sometimes also called California Holly and Christmas Berry. 
EXPLANATION OF THE PLATE. 
_ Puatz CXCII. Hereromeres aARBurirouia. 
1. A flowering branch, natural size. 
2. Diagram of a flower. 
3. A flower-bud, enlarged. 
4. Vertical section of a flower, enlarged. 
5. A stamen, enlarged. 
6. A pistil, enlarged. 
7. An ovule, much magnified. 
8. A fruiting branch, natural size. 
9. Cross section of a fruit, enlarged. 
10. Vertical section of a fruit, enlarged. 
11. A seed divided transversely, enlarged. 
12. An embryo, much magnified, 
